CS5530 datasheet(214/241 Pages) NSC

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214

Revision 4.1

I/O Port 020h / 0A0h (WO)

Master / Slave PIC OCW3

Reserved: Set to 0.

6:5

Special Mask Mode:

00 = No operation

10 = Reset Special Mask Mode

01 = No operation

11 = Set Special Mask Mode

Reserved: Set to 0.

Reserved: Set to 1.

Poll Command: 0 = Disable; 1 = Enable.

1:0

00 = No operation

10 = Read interrupt request register on next read of Port 20h

01 = No operation

11 = Read interrupt service register on next read of Port 20h.

I/O Port 020h / 0A0h (RO)

Master / Slave PIC Interrupt Request and Service Registers

for OCW3 Commands

Interrupt Request Register

IRQ7 / IRQ15 Pending: 0 = Yes; 1 = No.

IRQ6 / IRQ14 Pending: 0 = Yes; 1 = No.

IRQ5 / IRQ13 Pending: 0 = Yes; 1 = No.

IRQ4 / IRQ12 Pending: 0 = Yes; 1 = No.

IRQ3 / IRQ11 Pending: 0 = Yes; 1 = No.

IRQ2 / IRQ10 Pending: 0 = Yes; 1 = No.

IRQ1 / IRQ9 Pending: 0 = Yes; 1 = No.

IRQ0 / IRQ8 Pending: 0 = Yes; 1 = No.

Interrupt Service Register

IRQ7 / IRQ15 In-Service: 0= No; 1 = Yes.

IRQ6 / IRQ14 In-Service: 0= No; 1 = Yes.

IRQ5 / IRQ13 In-Service: 0= No; 1 = Yes.

IRQ4 / IRQ12 In-Service: 0= No; 1 = Yes.

IRQ3 / IRQ11 In-Service: 0= No; 1 = Yes.

IRQ2 / IRQ10 In-Service: 0= No; 1 = Yes.

IRQ1 / IRQ9 In-Service: 0= No; 1 = Yes.

IRQ0 / IRQ8 In-Service: 0= No; 1 = Yes.

Note: The function of this register is set with bits [1:0] in a write to 020h.

Table 4-28. Programmable Interrupt Controller Registers (Continued)

Bit

Description

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